function selectDB(){
    type=$("#goType").val();
    tableName=$("#tableName").val();
    condition=$("#condition").val();
    col=$("#col").val();
    $.post(
        "http://127.0.0.1:3333/jaina", {
            "go": "sqlTool",
            "action": type,
            "tableName":tableName,
            "condition":condition,
            "col":col
        },function (data){
            // var obj = JSON.parse(data);
            // $("#header").html=();
        }
    );
}